The Electromagnetic Spectrum
Bayani Gaba-gaba
Your eyes are extraordinary instruments, and they are also very nearly blind. The light they detect is a sliver of a much wider family of waves that fills the room you are sitting in right now: radio signals, the warmth from a radiator, the ultraviolet slipping through the window.
This lesson sets out the seven regions of the electromagnetic spectrum in order, shows what each one is used for, and explains why the same family that lets a surgeon see a broken bone can also give you skin cancer if you treat it carelessly.
Manufura
- Know that light is part of a continuous electromagnetic spectrum that includes radio, microwave, infrared, visible, ultraviolet, x-ray and gamma ray radiations and that all these waves travel at the same speed in free space
- Know the order of the electromagnetic spectrum in terms of decreasing wavelength and increasing frequency, including the colours of the visible spectrum
- Explain some of the uses of electromagnetic radiations, including radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays
- Explain the detrimental effects of excessive exposure of the human body to electromagnetic waves and describe simple protective measures against the risks
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An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
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Nazarin Darasi
Barka da kammala darasi akan The Electromagnetic Spectrum. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which of the following lists the electromagnetic spectrum in order of decreasing wavelength? A) Gamma, X-ray, ultraviolet, visible, infrared, microwave, radio B) Radio, microwave, infrared, visible, ultraviolet, X-ray, gamma C) Radio, infrared, microwave, visible, X-ray, ultraviolet, gamma D) Visible, infrared, radio, microwave, ultraviolet, X-ray, gamma Answer: B
- In free space, all electromagnetic waves have the same: A) wavelength B) frequency C) speed D) energy Answer: C
- Which colour of visible light has the shortest wavelength? A) Red B) Green C) Blue D) Violet Answer: D
- Which region of the spectrum is used in thermal imaging cameras? A) Radio waves B) Infrared C) Ultraviolet D) Gamma rays Answer: B
- Excessive exposure to ultraviolet radiation is most likely to cause: A) internal heating of tissue B) skin cancer and eye damage C) no harmful effects D) broken bones Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
The Electromagnetic Spectrum
Define the electromagnetic spectrum, and describe it in terms of frequencies and wavelengths
"Physics: The Electromagnetic Spectrum" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/15-1-the-electromagnetic-spectrum. Access for free at https://openstax.org/books/physics/pages/1-introduction
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